This right hand Indicator Unit can only be used with Shimano Alivio SL-M3100 9 speed shifters.
If the correct Indicator Unit is unavailable you can also use the unit from the following shifters:
Shimano Altus SL-M2010
This is a "B" match which indicates that the parts are usable, but differ in materials, appearance, finish & size etc.
Genuine Shimano replacement part.